According to the information provided by our suppliers, the current stock is HK version. We are sorry that we are not able to guarantee the version of the stock but only the model and specs on the product page. For VoLTE and VoWiFi services, they are always depending on the services provided by the telcos. According to the feedback from our customers, some telcos would disable the VoWiFi service for unlocked phones, which is completely beyond our control.